Specification sheet
Follistatin
Document IP-SPEC-FN1, specification revised 3 October 2026, printed 9 November 2026 by International Peptides, intlpeptides.com. Prices revised 27 October 2026. The certificate of analysis for a batch reports its purity and identity by the methods it names (size exclusion and SDS-PAGE for purity), endotoxin and its net content; the other limits are the specification the compound is supplied to.
Identity
| Product | Follistatin (FST) |
|---|---|
| Class | Cysteine-rich, N-glycosylated glycoprotein; the common long isoform is Follistatin-315, from a 344-residue precursor |
| Form | Lyophilised powder |
| Pack | 10 sealed vials of one strength, batch number on vial, carton and packing list |
| Range | Growth & IGF |
| Codes | FN1 |
Strengths and prices
| Code | Strength | Per box, USD | Per vial | Availability |
|---|---|---|---|---|
| FN1 | 1mg x 10 vials | $183.87 | $18.39 | Special order, 50-box minimum |
Specification limits
| Purity | On the batch certificate, with the method named there: size exclusion and SDS-PAGE for protein and glycoprotein lines, not an RP-HPLC area percentage |
|---|---|
| Identity | Against the reference standard by the method the batch certificate names |
| Endotoxin | Reported on the batch certificate |
| Net content | Label claim ± 5 % |
| Closure | 2 mL glass vial, bromobutyl stopper, aluminium flip-off seal |
| Storage | −20 °C, dark and dry; brief ambient transit tolerated |
| Shelf life | 24 months from manufacture; retest date on the batch record |
Batch numbers
A batch number reads form, month of manufacture, product code, batch sequence: for example, L2607-RT30-0002 is a lyophilised batch of RT30 made in July 2026, the second batch. The same number is on the vial, the carton, the packing list and the certificate, and any of them can be checked at https://intlpeptides.com/coa. Retained samples of every batch are held for twelve months from dispatch.
Terms of supply
Sold to trade accounts by the sealed box, priced in USD per box before any sales tax, shipped from the United States: to US addresses DAP, freight included from $1,000 of goods; to Canada and most other countries through the desk, which quotes the freight. On-shelf lines leave in 1 to 2 business days after payment clears; lines on their way in in 1 or 2 weeks; made-to-order lines in about four weeks; a special-order line is brought in on a 50-box minimum rather than held in stock. Paid against a proforma invoice in Bitcoin or USDT. Research chemical for laboratory use in vitro; not for human or animal consumption. The full terms: https://intlpeptides.com/terms.
International Peptides, 2810 Crossroads Dr #4200, Madison, WI 53718, United States. +1 646-847-1895. orders@intlpeptides.com. https://intlpeptides.com/peptides/follistatin